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Installing a DC Power Supply
If the power supply does not fit into the open slot, turn the module over before sliding it carefully into the open
Note
slot.
Step 2
Test the installation by trying to pull the power supply out of the slot without using the release latch.
If the power supply does not move out of place, it is secured in the slot. If the power supply moves, carefully press it all
the way into the slot until it clicks in place.
Step 3
Attach the power cable to the electrical outlet on the front of the power supply.
Step 4
Make sure that the other end of the power cable is attached to the appropriate power source for the power supply.
Note
Depending on the outlet receptacle on your power distribution unit, you might need the optional jumper cable
to connect the switch to your outlet receptacle.
Step 5
Verify that the power supply is operational by making sure that the power supply
what the power supply LEDs indicate, see
Installing a DC Power Supply
This topic is for installing the 48-V DC power supply into switch chassis.
You can replace one power supply while the other one provides power to the switch.
Before you begin
• The circuit breaker for the DC power source for the power supply must be turned off.
• The power supply that you are installing must be capable of using the same airflow direction as the fan
• A DC power source must be within reach of the power cable that will be used with the replacement power
• There must be an earth ground connection to the chassis that you are installing the replacement module.
• We recommend 8-AWG wire for DC installation in the U.S.
• All DC power supplies have reverse polarity protection. When you inadvertently connect the input power
Step 1
Holding the replacement power supply with one hand underneath the module and the other hand holding the handle, turn
the power supply so that its release latch is on the right side and align the back end of the power supply (the end with the
electrical connections) to the open power supply slot before carefully sliding the power supply all the way into the slot
until it clicks into place.
Cisco Nexus 9336PQ ACI-Mode Switch Hardware Installation Guide
40
Power Supply LEDs, on page
trays installed in the same switch
supply. If you are using n+n power redundancy, there must be a separate power source for each power
supply installed in the chassis (do not mix AC and DC power sources for the same switch). Otherwise,
only one power source is required.
Typically, the chassis is grounded by its metal-to-metal connection to a grounded rack. If you need to
ground this chassis by another means, see
(+) to the DC PSU's – terminal and the input power – to the DC PSU's (+) terminal, the PSU will not
be damaged and will operate fine after the input power feeds are correctly wired.
LED is green. For information on
56.
Grounding the Chassis, on page
Replacing Modules
21.
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